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TPS54KB20

ACTIVE

4-V to 16-V input, 25-A remote sense synchronous step-down converter

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Data sheet

TPS54KB20

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 25 Vin (max) (V) 16 Vin (min) (V) 4 Vout (max) (V) 5.5 Vout (min) (V) 0.9 Features Adjustable current limit, Adjustable soft start, Differential Remote Sense, Enable, Forced PWM, Light-load efficiency, Overcurrent protection, Overtemperature protection, Overvoltage protection, Power good, Prebias startup, Synchronous rectification, UVLO Fixed, Undervoltage protection Control mode D-CAP4 Operating temperature range (°C) -40 to 125 Duty cycle (max) (%) 85
Rating Catalog Topology Buck Iout (max) (A) 25 Vin (max) (V) 16 Vin (min) (V) 4 Vout (max) (V) 5.5 Vout (min) (V) 0.9 Features Adjustable current limit, Adjustable soft start, Differential Remote Sense, Enable, Forced PWM, Light-load efficiency, Overcurrent protection, Overtemperature protection, Overvoltage protection, Power good, Prebias startup, Synchronous rectification, UVLO Fixed, Undervoltage protection Control mode D-CAP4 Operating temperature range (°C) -40 to 125 Duty cycle (max) (%) 85
WQFN-FCRLF (RZR) 16 10.5 mm² (3 mm × 3 mm) WQFN-FCRLF (RZR) 16 10.5 mm² (3.5 mm × 3 mm)
  • 4V to 16V input voltage range
  • 3.1V to 5.3V external VCC bias support
  • 5.8mΩ and 2.3mΩ MOSFETs
  • 25A continuous output current
  • Optimized 16-pin WQFN-HR package for efficiency and thermal performance
  • ±0.5% reference (VREF) for TJ = –40°C to +125°C
  • VREF to 5.5V output voltage range
  • Differential remote sense
  • D-CAP4 with ultra-fast load-step response
  • Supports all ceramic output capacitors
  • Selectable Auto-skip Eco-mode for high light-load efficiency
  • Programmable current limit with RILIM
  • Selectable switching frequency: 800kHz, 1.1MHz, 1.4MHz
  • Programmable soft-start time
  • Prebiased start-up capability
  • Open-drain power-good output
  • Valley overcurrent limit protection
  • Overvoltage and undervoltage fault protection
  • Pin compatible with 30A TPS54KC23
  • 4V to 16V input voltage range
  • 3.1V to 5.3V external VCC bias support
  • 5.8mΩ and 2.3mΩ MOSFETs
  • 25A continuous output current
  • Optimized 16-pin WQFN-HR package for efficiency and thermal performance
  • ±0.5% reference (VREF) for TJ = –40°C to +125°C
  • VREF to 5.5V output voltage range
  • Differential remote sense
  • D-CAP4 with ultra-fast load-step response
  • Supports all ceramic output capacitors
  • Selectable Auto-skip Eco-mode for high light-load efficiency
  • Programmable current limit with RILIM
  • Selectable switching frequency: 800kHz, 1.1MHz, 1.4MHz
  • Programmable soft-start time
  • Prebiased start-up capability
  • Open-drain power-good output
  • Valley overcurrent limit protection
  • Overvoltage and undervoltage fault protection
  • Pin compatible with 30A TPS54KC23

The TPS54KB2x device is a small, high-efficiency, synchronous buck converter with an adaptive on-time D-CAP4 control mode. The control method provides low minimum on-time and fast load-transient response across the entire output voltage range without requiring an external compensation network. Because external compensation is not required, the device is easy to use and requires few external components. The device is well-designed for space-constrained data center applications.

The TPS54KB2x device has differential remote sense, high-performance integrated MOSFETs, and an accurate ±0.5% reference over the specified operating junction temperature range. The device features accurate load regulation and line regulation, Eco-mode or FCCM operation, programmable settings through the MSEL pin and programmable soft start.

The TPS54KB2x device is a lead-free device. The device is RoHS compliant without exemption.

The TPS54KB2x device is a small, high-efficiency, synchronous buck converter with an adaptive on-time D-CAP4 control mode. The control method provides low minimum on-time and fast load-transient response across the entire output voltage range without requiring an external compensation network. Because external compensation is not required, the device is easy to use and requires few external components. The device is well-designed for space-constrained data center applications.

The TPS54KB2x device has differential remote sense, high-performance integrated MOSFETs, and an accurate ±0.5% reference over the specified operating junction temperature range. The device features accurate load regulation and line regulation, Eco-mode or FCCM operation, programmable settings through the MSEL pin and programmable soft start.

The TPS54KB2x device is a lead-free device. The device is RoHS compliant without exemption.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet TPS54KB2x 4V to 16V Input, 25 A, Remote Sense, D-CAP4 Synchronous Buck Converter datasheet (Rev. A) PDF | HTML Feb 22, 2024
Application note Point-of-Load Designs in Data Center Applications for Intel Xeon Sapphire Rapids Scalable Processors (Rev. C) PDF | HTML Oct 9, 2024
Application brief Solving Power Design Challenges in Enterprise SSD Applications PDF | HTML Sep 23, 2024
Application brief Detailed Comparison Between TPS54KB20 Family and TPS53353 Family PDF | HTML Sep 3, 2024
Application note Analyzing Butterfly-Style Footprint and Input Capacitor Removal Effects PDF | HTML Feb 15, 2024
Product overview TPS54KB20 Pre-Production to Production Change List PDF | HTML May 4, 2023
Certificate TPS54KB20EVM EU RoHS Declaration of Conformity (DoC) Mar 13, 2023

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

TPS54KB20 SIMPLIS Model

SLVME36.ZIP (480 KB) - SIMPLIS model
Supported products & hardware
Calculation tool

TPS54KB2X-CALC — TPS54KB2x TPS54KC23 calculator tool and checklist

Excel-based design calculator tool with schematic and layout checklist
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
WQFN-FCRLF (RZR) 16 Ultra Librarian
WQFN-FCRLF (RZR) 16 Ultra Librarian
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